Star · M
GJ 4205
GJ 4205 is a main-sequence star of spectral type M in the constellation Cygnus, 57.5 light-years from the Sun.
| Other names | HIP 106557 |
|---|---|
| Constellation | Cygnus |
| Distance | 57.5 light-years (17.6 pc) |
| Apparent magnitude | magnitude 12.01 |
| Absolute magnitude | magnitude 10.78 |
| Spectral type | M |
| Surface temperature | 3,390 K |
| Luminosity | 0.0292 L☉ |
| Radius | 0.495 R☉ |
| Mass | 0.408 M☉ (estimated) |
| Right ascension (J2000) | 21h 34m 50.2s |
| Declination (J2000) | +51° 32′ 14″ |
| Space velocity (relative to the Sun) | 48.7 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 12.01. Visible from the whole Northern Hemisphere and south to latitude 38° S. North of latitude 38° N it never sets. It stands highest at midnight in August, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1968. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.0 million years.
The Sun seen from there
From a planet around GJ 4205, the Sun would look like a star of magnitude 6.06, in the direction where our sky has the constellation Vela. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.